Curious about something in the wake of Katrina: If we had been prepared to do so, could cellphone communications have been restored (at least periodically) to the area by flying any kind of cell relay equipment over the area in blimps? I can imagine it would take special equipment, since cell towers are usually attached to land lines and a blimp (obviously) won't have a landline connection, but I do wonder if something like that could be feasible for getting at least limited communications re-established quickly?
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